ICND1 IPv4 and IPv6 5

Question 1

Which IPv6 address type is functionally equivalent to an IPv4 private address and is routable only within an organization (not on the internet)?

Accepted Answer

Unique local (FC00::/7)

Answer

Unique local addresses (FC00::/7, typically FD00::/8) are the IPv6 equivalent of RFC 1918 private addresses — routable within a site but not on the global internet.

Question 2

What is the broadcast address of the subnet 10.0.0.0/8?

Accepted Answer

10.255.255.255

Answer

For 10.0.0.0/8, all 24 host bits set to 1 gives a broadcast address of 10.255.255.255.

Question 3

A Cisco router shows 'show ipv6 interface brief' and displays 'FE80::1' under GigabitEthernet0/0. What kind of address is this?

Accepted Answer

Link-local address auto-configured on the interface

Answer

FE80::/10 addresses are link-local and are automatically configured on every IPv6-enabled interface without needing global routing.

Question 4

Which protocol does IPv6 use instead of IGMP for multicast group management?

Accepted Answer

MLD (Multicast Listener Discovery)

Answer

Multicast Listener Discovery (MLD) is the IPv6 equivalent of IGMP and is used by hosts to join or leave multicast groups.

Question 5

How many IPv4 addresses does a /23 subnet contain in total?

Accepted Answer

512

Answer

A /23 has 9 host bits, so 2^9 = 512 total addresses (510 usable hosts).

(ICND1) Interconnecting Cisco Networking Devices Part 1 Practice Test

(ICND1) Interconnecting Cisco Networking Devices Part 1 Practice Test

ICND1 IPv4 and IPv6 5